{
volScalarField alphaEff_0_25("alphaEff_0_25",turbulence->nu()/Pr_0_25);

fvScalarMatrix TEqn_0_25
(
fvm::ddt(T_0_25)
+ fvm::div(phi, T_0_25)
- fvm::laplacian(alphaEff_0_25, T_0_25)
+ U.component(0)*gamma_0_25     //if your flow is periodic in y or z directions, e.g. component(1) or  //component(2).
);

TEqn_0_25.solve();
}
